JP2000148604A5 - Storage device control method and magnetic disk device control method - Google Patents

Storage device control method and magnetic disk device control method Download PDF

Info

Publication number
JP2000148604A5
JP2000148604A5 JP1998322068A JP32206898A JP2000148604A5 JP 2000148604 A5 JP2000148604 A5 JP 2000148604A5 JP 1998322068 A JP1998322068 A JP 1998322068A JP 32206898 A JP32206898 A JP 32206898A JP 2000148604 A5 JP2000148604 A5 JP 2000148604A5
Authority
JP
Japan
Prior art keywords
magnetic disk
control method
device control
storage
storage device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1998322068A
Other languages
Japanese (ja)
Other versions
JP2000148604A (en
Filing date
Publication date
Application filed filed Critical
Priority to JP10322068A priority Critical patent/JP2000148604A/en
Priority claimed from JP10322068A external-priority patent/JP2000148604A/en
Priority to EP99122421A priority patent/EP1001342A3/en
Priority to US09/437,262 priority patent/US6625755B1/en
Priority to KR1019990049866A priority patent/KR100345632B1/en
Publication of JP2000148604A publication Critical patent/JP2000148604A/en
Priority to US10/422,941 priority patent/US6918054B2/en
Publication of JP2000148604A5 publication Critical patent/JP2000148604A5/en
Pending legal-status Critical Current

Links

Description

【特許請求の範囲】
【請求項１】 上位装置との間で授受されるデータが格納される記憶媒体を備えた記憶装置の制御方法であって、
前記記憶媒体に設定される複数の記憶領域の各々、または前記記憶媒体に格納される複数種の前記データの各々について、当該記憶領域または当該データに対するアクセス動作の再試行回数およびアクセス所要時間の少なくとも一方の制限値を個別に設定することを特徴とする記憶装置の制御方法。
【請求項２】 請求項１記載の記憶装置の制御方法において、
前記上位装置から前記記憶装置に対して、前記記憶媒体に対する前記記憶領域の設定方法、および複数の前記記憶領域または前記データの各々に対するアクセス動作について設定すべき前記制限値、の少なくとも一方を指定するコマンドインタフェースを備えたことを特徴とする記憶装置の制御方法。
【請求項３】 請求項１記載の記憶装置の制御方法において、
前記アクセス動作を行わせるために前記上位装置から前記記憶装置に与えられるアクセス命令の各々に、当該アクセス命令にてアクセスされる前記記憶領域における前記制限値を指定するための情報を付随させることを特徴とする記憶装置の制御方法。
【請求項４】 上位装置との間で授受されるデータが格納される磁気ディスクを備えた磁気ディスク装置の制御方法であって、
前記磁気ディスク装置は、前記上位装置と接続するインタフェースを備え前記磁気ディスクに対する前記データの読み出し／書き込みを含むアクセスを制御する磁気ディスク制御装置と、前記データが格納される記憶領域が設定される前記磁気ディスクとを備え、
前記磁気ディスクに設定される複数の前記記憶領域の各々、または前記磁気ディスクに格納される複数種の前記データの各々について、当該記憶領域または当該データに対するアクセス動作の再試行回数およびアクセス所要時間の少なくとも一方の制限値を個別に設定するものであり、
前記上位装置から前記インタフェースで前記磁気ディスク制御装置に対して、前記磁気ディスクに対する前記記憶領域の設定方法、および複数の前記記憶領域または前記データの各々に対するアクセス動作について設定すべき前記制限値、を指定するステップと、
前記磁気ディスク制御装置が、前記上位装置から与えられるアクセス命令に対して前記設定に従って前記アクセス動作を実行するステップとを有することを特徴とする磁気ディスク装置の制御方法。
【請求項５】 上位装置との間で授受されるデータが格納される磁気ディスクを備えた磁気ディスク装置の制御方法であって、
前記磁気ディスク装置は、前記上位装置と接続するインタフェースを備え前記磁気ディスクに対する前記データの読み出し／書き込みを含むアクセスを制御する磁気ディスク制御装置と、前記データが格納される記憶領域が設定される前記磁気ディスクとを備え、
前記磁気ディスクに設定される複数の前記記憶領域の各々、または前記磁気ディスクに格納される複数種の前記データの各々について、当該記憶領域または当該データに対するアクセス動作の再試行回数およびアクセス所要時間の少なくとも一方の制限値を個別に設定するものであり、
前記上位装置が、前記磁気ディスク制御装置に対し与えるアクセス命令の各々に、当該アクセス命令にてアクセスされる前記記憶領域または前記データにおける前記制限値を指定するための情報を付随させるステップと、
前記磁気ディスク制御装置が、前記アクセス命令の各々における前記制限値を指定するための情報を参照して、当該制限値に従って、当該アクセス命令にてアクセスされる前記記憶領域または前記データに対するアクセス動作を実行するステップとを有することを特徴とする磁気ディスク装置の制御方法。 [Claims]
1. A method for controlling a storage device including a storage medium for storing data exchanged with and from a higher-level device.
For each of the plurality of storage areas set in the storage medium, or each of the plurality of types of the data stored in the storage medium, at least the number of retries and the access time required for the access operation to the storage area or the data. A storage device control method characterized in that one of the limit values is set individually.
2. The storage device control method according to claim 1, wherein the storage device is controlled.
From the higher-level device to the storage device, at least one of a method of setting the storage area for the storage medium and the limit value to be set for an access operation for each of the plurality of the storage areas or the data is specified. A storage device control method characterized by having a command interface.
3. The method for controlling a storage device according to claim 1.
Each of the access instructions given from the higher-level device to the storage device in order to perform the access operation is accompanied by information for designating the limit value in the storage area accessed by the access instruction. A characteristic storage device control method.
4. A method for controlling a magnetic disk device including a magnetic disk for storing data exchanged with and from a host device.
The magnetic disk device includes an interface for connecting to the host device and controls access to the magnetic disk including reading / writing the data, and a storage area in which the data is stored is set. Equipped with a magnetic disk
For each of the plurality of storage areas set in the magnetic disk, or for each of the plurality of types of data stored in the magnetic disk, the number of retries and access time required for the access operation to the storage area or the data. At least one limit value is set individually,
From the higher-level device to the magnetic disk control device at the interface, a method of setting the storage area for the magnetic disk and the limit value to be set for an access operation for each of the plurality of the storage areas or the data. The steps to specify and
A method for controlling a magnetic disk device, wherein the magnetic disk control device includes a step of executing the access operation according to the setting in response to an access command given from the higher-level device.
5. A method for controlling a magnetic disk device including a magnetic disk for storing data exchanged with and from a host device.
The magnetic disk device includes an interface for connecting to the host device and controls access to the magnetic disk including reading / writing the data, and a storage area in which the data is stored is set. Equipped with a magnetic disk
For each of the plurality of storage areas set in the magnetic disk, or for each of the plurality of types of data stored in the magnetic disk, the number of retries and access time required for the access operation to the storage area or the data. At least one limit value is set individually,
A step of attaching information for designating the limit value in the storage area or the data accessed by the access instruction to each of the access instructions given by the host device to the magnetic disk control device.
The magnetic disk control device refers to the information for designating the limit value in each of the access instructions, and performs an access operation to the storage area or the data accessed by the access instruction according to the limit value. A method of controlling a magnetic disk drive, characterized in that it has steps to perform.

JP10322068A 1998-11-12 1998-11-12 Method for controlling storage devices Pending JP2000148604A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP10322068A JP2000148604A (en) 1998-11-12 1998-11-12 Method for controlling storage devices
EP99122421A EP1001342A3 (en) 1998-11-12 1999-11-10 Storage apparatus and control method thereof
US09/437,262 US6625755B1 (en) 1998-11-12 1999-11-10 Storage apparatus and control method thereof
KR1019990049866A KR100345632B1 (en) 1998-11-12 1999-11-11 A memory device and a method for controlling the same
US10/422,941 US6918054B2 (en) 1998-11-12 2003-04-25 Storage apparatus and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10322068A JP2000148604A (en) 1998-11-12 1998-11-12 Method for controlling storage devices

Publications (2)

Publication Number Publication Date
JP2000148604A JP2000148604A (en) 2000-05-30
JP2000148604A5 true JP2000148604A5 (en) 2005-12-22

Family

ID=18139568

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10322068A Pending JP2000148604A (en) 1998-11-12 1998-11-12 Method for controlling storage devices

Country Status (4)

Country Link
US (2) US6625755B1 (en)
EP (1) EP1001342A3 (en)
JP (1) JP2000148604A (en)
KR (1) KR100345632B1 (en)

Families Citing this family (99)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000148604A (en) * 1998-11-12 2000-05-30 Hitachi Ltd Method for controlling storage devices
JP2001331377A (en) 2000-05-22 2001-11-30 Hitachi Ltd Processing method for reproduction error, and disk device using the same
US6513135B2 (en) * 2000-08-02 2003-01-28 Hitachi, Ltd. Automatic read reassignment method and a magnetic disk drive
US6886108B2 (en) * 2001-04-30 2005-04-26 Sun Microsystems, Inc. Threshold adjustment following forced failure of storage device
JP2002334527A (en) * 2001-05-11 2002-11-22 Matsushita Electric Ind Co Ltd Disk memory device, defect determination method for disk memory device, and recording medium
JP2005505853A (en) * 2001-10-12 2005-02-24 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ Apparatus and method for reading or writing user data
JP4651913B2 (en) * 2003-02-17 2011-03-16 株式会社日立製作所 Storage system
KR100498491B1 (en) * 2003-03-19 2005-07-01 삼성전자주식회사 Method and apparatus retrying for reading or writing of a data
JP4060235B2 (en) 2003-05-22 2008-03-12 株式会社日立製作所 Disk array device and disk array device control method
JP2004348464A (en) 2003-05-22 2004-12-09 Hitachi Ltd Storage device and communication signal shaping circuit
US7296142B2 (en) * 2003-06-24 2007-11-13 Seagate Technology Llc Multi-tiered retry scheme for reading copies of information from a storage medium
JP2005025829A (en) * 2003-06-30 2005-01-27 Toshiba Corp Disk storage device and data stream control method
JP4156499B2 (en) 2003-11-28 2008-09-24 株式会社日立製作所 Disk array device
JP4497918B2 (en) 2003-12-25 2010-07-07 株式会社日立製作所 Storage system
JP4634049B2 (en) 2004-02-04 2011-02-16 株式会社日立製作所 Error notification control in disk array system
US7373549B2 (en) * 2004-04-06 2008-05-13 Intel Corporation Error detection and recovery in a storage driver
JP4227931B2 (en) * 2004-04-15 2009-02-18 株式会社日立製作所 Information storage device, information storage method, and information storage processing program
US7487395B2 (en) * 2004-09-09 2009-02-03 Microsoft Corporation Method, system, and apparatus for creating an architectural model for generating robust and easy to manage data protection applications in a data protection system
US7478265B2 (en) 2004-10-14 2009-01-13 Hewlett-Packard Development Company, L.P. Error recovery for input/output operations
US8066515B2 (en) * 2004-11-17 2011-11-29 Nvidia Corporation Multiple graphics adapter connection systems
JP2006338734A (en) * 2005-05-31 2006-12-14 Hitachi Global Storage Technologies Netherlands Bv Data storage apparatus and error recovery method
TW200709031A (en) * 2005-08-19 2007-03-01 Lite On It Corp Playing method for digital videos, a method for reading data and a method for smoothly playing pictures
US8060713B1 (en) 2005-12-21 2011-11-15 Emc (Benelux) B.V., S.A.R.L. Consolidating snapshots in a continuous data protection system using journaling
US7849361B2 (en) * 2005-12-22 2010-12-07 Emc Corporation Methods and apparatus for multiple point in time data access
US20070174678A1 (en) * 2006-01-17 2007-07-26 Allen King Apparatus, system, and method for a storage device's enforcing write recovery of erroneous data
US7490263B2 (en) * 2006-01-17 2009-02-10 Allen King Apparatus, system, and method for a storage device's enforcing write recovery of erroneous data
JP4576460B2 (en) * 2006-11-10 2010-11-10 パイオニア株式会社 Streaming data playback program and optical disk drive
JP2009054083A (en) * 2007-08-29 2009-03-12 Hitachi Ltd Processor, data transfer unit, and multi-core processor system
US7860836B1 (en) 2007-12-26 2010-12-28 Emc (Benelux) B.V., S.A.R.L. Method and apparatus to recover data in a continuous data protection environment using a journal
US7840536B1 (en) 2007-12-26 2010-11-23 Emc (Benelux) B.V., S.A.R.L. Methods and apparatus for dynamic journal expansion
US7844856B1 (en) * 2007-12-26 2010-11-30 Emc (Benelux) B.V., S.A.R.L. Methods and apparatus for bottleneck processing in a continuous data protection system having journaling
US8041940B1 (en) 2007-12-26 2011-10-18 Emc Corporation Offloading encryption processing in a storage area network
US9501542B1 (en) 2008-03-11 2016-11-22 Emc Corporation Methods and apparatus for volume synchronization
US8392680B1 (en) 2010-03-30 2013-03-05 Emc International Company Accessing a volume in a distributed environment
US8332687B1 (en) 2010-06-23 2012-12-11 Emc Corporation Splitter used in a continuous data protection environment
US8402061B1 (en) 2010-08-27 2013-03-19 Amazon Technologies, Inc. Tiered middleware framework for data storage
US8688666B1 (en) * 2010-08-27 2014-04-01 Amazon Technologies, Inc. Multi-blob consistency for atomic data transactions
US8856089B1 (en) 2010-08-27 2014-10-07 Amazon Technologies, Inc. Sub-containment concurrency for hierarchical data containers
US8510344B1 (en) 2010-08-27 2013-08-13 Amazon Technologies, Inc. Optimistically consistent arbitrary data blob transactions
US8510304B1 (en) 2010-08-27 2013-08-13 Amazon Technologies, Inc. Transactionally consistent indexing for data blobs
US8621161B1 (en) 2010-09-23 2013-12-31 Amazon Technologies, Inc. Moving data between data stores
US8433869B1 (en) 2010-09-27 2013-04-30 Emc International Company Virtualized consistency group using an enhanced splitter
US8478955B1 (en) 2010-09-27 2013-07-02 Emc International Company Virtualized consistency group using more than one data protection appliance
US8335771B1 (en) 2010-09-29 2012-12-18 Emc Corporation Storage array snapshots for logged access replication in a continuous data protection system
US8694700B1 (en) 2010-09-29 2014-04-08 Emc Corporation Using I/O track information for continuous push with splitter for storage device
US8335761B1 (en) 2010-12-02 2012-12-18 Emc International Company Replicating in a multi-copy environment
US9256605B1 (en) 2011-08-03 2016-02-09 Emc Corporation Reading and writing to an unexposed device
JP5971509B2 (en) * 2011-08-30 2016-08-17 ソニー株式会社 Information processing apparatus and method, and recording medium
US8898112B1 (en) 2011-09-07 2014-11-25 Emc Corporation Write signature command
US9223659B1 (en) 2012-06-28 2015-12-29 Emc International Company Generating and accessing a virtual volume snapshot in a continuous data protection system
US10235145B1 (en) 2012-09-13 2019-03-19 Emc International Company Distributed scale-out replication
US9336094B1 (en) 2012-09-13 2016-05-10 Emc International Company Scaleout replication of an application
US8996460B1 (en) 2013-03-14 2015-03-31 Emc Corporation Accessing an image in a continuous data protection using deduplication-based storage
US9110914B1 (en) 2013-03-14 2015-08-18 Emc Corporation Continuous data protection using deduplication-based storage
US9696939B1 (en) 2013-03-14 2017-07-04 EMC IP Holding Company LLC Replicating data using deduplication-based arrays using network-based replication
US9383937B1 (en) 2013-03-14 2016-07-05 Emc Corporation Journal tiering in a continuous data protection system using deduplication-based storage
US9152339B1 (en) 2013-03-15 2015-10-06 Emc Corporation Synchronization of asymmetric active-active, asynchronously-protected storage
US9244997B1 (en) 2013-03-15 2016-01-26 Emc Corporation Asymmetric active-active access of asynchronously-protected data storage
US9081842B1 (en) 2013-03-15 2015-07-14 Emc Corporation Synchronous and asymmetric asynchronous active-active-active data access
US9086997B2 (en) * 2013-06-20 2015-07-21 International Business Machines Corporation Memory uncorrectable error handling technique for reducing the impact of noise
US9069709B1 (en) 2013-06-24 2015-06-30 Emc International Company Dynamic granularity in data replication
US9087112B1 (en) 2013-06-24 2015-07-21 Emc International Company Consistency across snapshot shipping and continuous replication
US9146878B1 (en) 2013-06-25 2015-09-29 Emc Corporation Storage recovery from total cache loss using journal-based replication
US9367260B1 (en) 2013-12-13 2016-06-14 Emc Corporation Dynamic replication system
US9405765B1 (en) 2013-12-17 2016-08-02 Emc Corporation Replication of virtual machines
US9158630B1 (en) 2013-12-19 2015-10-13 Emc Corporation Testing integrity of replicated storage
US9898201B2 (en) 2014-03-24 2018-02-20 Hitachi, Ltd. Non-volatile memory device, and storage apparatus to reduce a read retry occurrence frequency and prevent read performance from lowering
US9189339B1 (en) 2014-03-28 2015-11-17 Emc Corporation Replication of a virtual distributed volume with virtual machine granualarity
US9274718B1 (en) 2014-06-20 2016-03-01 Emc Corporation Migration in replication system
US10082980B1 (en) 2014-06-20 2018-09-25 EMC IP Holding Company LLC Migration of snapshot in replication system using a log
US9619543B1 (en) 2014-06-23 2017-04-11 EMC IP Holding Company LLC Replicating in virtual desktop infrastructure
US10324798B1 (en) 2014-09-25 2019-06-18 EMC IP Holding Company LLC Restoring active areas of a logical unit
US10437783B1 (en) 2014-09-25 2019-10-08 EMC IP Holding Company LLC Recover storage array using remote deduplication device
US10101943B1 (en) 2014-09-25 2018-10-16 EMC IP Holding Company LLC Realigning data in replication system
US9910621B1 (en) 2014-09-29 2018-03-06 EMC IP Holding Company LLC Backlogging I/O metadata utilizing counters to monitor write acknowledgements and no acknowledgements
US9529885B1 (en) 2014-09-29 2016-12-27 EMC IP Holding Company LLC Maintaining consistent point-in-time in asynchronous replication during virtual machine relocation
US10496487B1 (en) 2014-12-03 2019-12-03 EMC IP Holding Company LLC Storing snapshot changes with snapshots
US9600377B1 (en) 2014-12-03 2017-03-21 EMC IP Holding Company LLC Providing data protection using point-in-time images from multiple types of storage devices
US9405481B1 (en) 2014-12-17 2016-08-02 Emc Corporation Replicating using volume multiplexing with consistency group file
US9632881B1 (en) 2015-03-24 2017-04-25 EMC IP Holding Company LLC Replication of a virtual distributed volume
US10296419B1 (en) 2015-03-27 2019-05-21 EMC IP Holding Company LLC Accessing a virtual device using a kernel
US9411535B1 (en) 2015-03-27 2016-08-09 Emc Corporation Accessing multiple virtual devices
US9678680B1 (en) 2015-03-30 2017-06-13 EMC IP Holding Company LLC Forming a protection domain in a storage architecture
US10853181B1 (en) 2015-06-29 2020-12-01 EMC IP Holding Company LLC Backing up volumes using fragment files
US9684576B1 (en) 2015-12-21 2017-06-20 EMC IP Holding Company LLC Replication using a virtual distributed volume
US10235196B1 (en) 2015-12-28 2019-03-19 EMC IP Holding Company LLC Virtual machine joining or separating
US10067837B1 (en) 2015-12-28 2018-09-04 EMC IP Holding Company LLC Continuous data protection with cloud resources
US10133874B1 (en) 2015-12-28 2018-11-20 EMC IP Holding Company LLC Performing snapshot replication on a storage system not configured to support snapshot replication
US10579282B1 (en) 2016-03-30 2020-03-03 EMC IP Holding Company LLC Distributed copy in multi-copy replication where offset and size of I/O requests to replication site is half offset and size of I/O request to production volume
US10152267B1 (en) 2016-03-30 2018-12-11 Emc Corporation Replication data pull
US10235087B1 (en) 2016-03-30 2019-03-19 EMC IP Holding Company LLC Distributing journal data over multiple journals
US10235060B1 (en) 2016-04-14 2019-03-19 EMC IP Holding Company, LLC Multilevel snapshot replication for hot and cold regions of a storage system
JP6156710B2 (en) * 2016-05-16 2017-07-05 ソニー株式会社 Information processing apparatus and method, and recording medium
US10235091B1 (en) 2016-09-23 2019-03-19 EMC IP Holding Company LLC Full sweep disk synchronization in a storage system
US10146961B1 (en) 2016-09-23 2018-12-04 EMC IP Holding Company LLC Encrypting replication journals in a storage system
US10210073B1 (en) 2016-09-23 2019-02-19 EMC IP Holding Company, LLC Real time debugging of production replicated data with data obfuscation in a storage system
US10019194B1 (en) 2016-09-23 2018-07-10 EMC IP Holding Company LLC Eventually consistent synchronous data replication in a storage system
US10235090B1 (en) 2016-09-23 2019-03-19 EMC IP Holding Company LLC Validating replication copy consistency using a hash function in a storage system
JP6814020B2 (en) * 2016-10-26 2021-01-13 キヤノン株式会社 Information processing equipment, its control method, and programs

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0498472B1 (en) * 1986-08-12 1994-10-12 Hitachi, Ltd. Microprocessor for retrying data transfer
JP2770611B2 (en) * 1991-07-17 1998-07-02 日本電気株式会社 Data error retry circuit
US5388254A (en) * 1992-03-27 1995-02-07 International Business Machines Corporation Method and means for limiting duration of input/output (I/O) requests
US5548783A (en) * 1993-10-28 1996-08-20 Dell Usa, L.P. Composite drive controller including composite disk driver for supporting composite drive accesses and a pass-through driver for supporting accesses to stand-alone SCSI peripherals
JPH0895717A (en) 1994-09-20 1996-04-12 Ricoh Co Ltd Magnetooptic disk drive and disk drive system
US5872905A (en) * 1996-03-14 1999-02-16 Matsushita Electric Industrial Co., Ltd. Recording area management method, error recovery processing method, and storage apparatus
US6553476B1 (en) * 1997-02-10 2003-04-22 Matsushita Electric Industrial Co., Ltd. Storage management based on predicted I/O execution times
US6012090A (en) * 1997-03-14 2000-01-04 At&T Corp. Client-side parallel requests for network services using group name association
JPH10320913A (en) * 1997-05-23 1998-12-04 Sony Corp Apparatuses and method for recording data, for reproducing data, for recording reproducing data, and transmission medium
JPH11119923A (en) 1997-10-20 1999-04-30 Fujitsu Ltd Data access controller and record medium recorded with data access control program
JP2000148604A (en) * 1998-11-12 2000-05-30 Hitachi Ltd Method for controlling storage devices

Similar Documents

Publication Publication Date Title
JP2000148604A5 (en) Storage device control method and magnetic disk device control method
EP1569220B1 (en) Automatic data update method of data storage system and disk drive using the same
EP1607855A3 (en) System and method for improved program launch time
EP0911825A3 (en) Recording apparatus, recording method, playback apparatus, playback method, recording/playback apparatus, recording/playback method, presentation medium and recording medium
JP2000353056A5 (en)
KR100532411B1 (en) Method and apparatus for controlling a data storage system according to temperature
JPH0444673A (en) Defective information recording system for disk device
US6104555A (en) Method and device for duplicating an initial program of a hard disk drive
JPH08293174A (en) Allowable off-track volume setting method, its device and disk device
JP2000011615A5 (en)
US5875453A (en) Apparatus for and method of information processing
KR920006297B1 (en) Actuator control method of hard disc driver
JP2616738B2 (en) Servo track writer
JP3539802B2 (en) Information storage device
JP3546741B2 (en) Hard disk unit, user area setting method used therefor, and recording medium recording control program therefor
KR100446287B1 (en) Method for releasing stress of a magnetic head core, in particular with regards to preventing deterioration of a data processing speed when magnetic stress is released, and preventing an error caused by the magnetic stress
JPH01180620A (en) Disk controller
JPS6240521A (en) Disk controlling system
JPH08194903A (en) Data writing method and floppy disc apparatus utilizing the method
JPH1049312A (en) Magnetic disk drive
JPH11338812A (en) Hard disk control method and storage medium recording hard disk control firmware
JPH0371478U (en)
JPS6311705B2 (en)
JP2006179147A (en) Magnetic disk device and recording control method
KR100417224B1 (en) How to Overlay a Program on a Hard Disk Drive